<template>
<div>
    <!-- 商品分类导航 -->
    <div class="type-nav">
        <div class="container">
            <div @mouseleave="leaveItem">
                <h2 class="all" @mouseenter="changeShow">全部商品分类</h2>
                <div class="sort" v-show="show">
                    <div class="all-sort-list2" @click="goSearch">
                        <div class="item" 
                            v-for="(it1, index) in navList" 
                            :key="it1.categoryId">
                            <h3 @mouseenter='indexChange(index)' :class="{cur: curIndex == index}">
                                <a :data-category1Id="it1.categoryName">{{it1.categoryName}}</a>
                            </h3>
                            <div class="item-list clearfix" :style="{display: curIndex == index ? 'block': 'none'}">
                                <div class="subitem" v-for="it2 in it1.categoryChild" :key="it2.categoryId">
                                    <dl class="fore">
                                        <dt>
                                            <a :data-category2Id="it2.categoryName">{{it2.categoryName}}</a>
                                        </dt>
                                        <dd>
                                            <em v-for="it3 in it2.categoryChild" :key="it3.categoryId">
                                                <a :data-category3Id="it3.categoryName">{{it3.categoryName}}</a>
                                            </em>
                                        </dd>
                                    </dl>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <nav class="nav">
                <a href="###">服装城</a>
                <a href="###">美妆馆</a>
                <a href="###">尚品汇超市</a>
                <a href="###">全球购</a>
                <a href="###">闪购</a>
                <a href="###">团购</a>
                <a href="###">有趣</a>
                <a href="###">秒杀</a>
            </nav>
        </div>
    </div>
</div>
</template>

<script>
import { mapMutations, mapState, } from 'vuex';
import throttle from  'lodash/throttle';

export default {
    name: 'TypeNav',
    data() {
        return {
            curIndex: -1,
            cur: 'cur',
            show: true,
        }
    },
    mounted() {
        this.show = this.$route.path == '/home';
    },
    computed: {
        ...mapState('home', ['navList']),
    },
    methods: {
        ...mapMutations('home',['categoryList']),
        indexChange:throttle(function(index) {
            this.curIndex = index;
        }),
        changeShow() {
            if (this.$route.path != '/home') {
                this.show = true;
            }
        },
        leaveItem() {
            this.curIndex = -1;
            if (this.$route.path != '/home') {
                this.show = false;
            }
        },
        goSearch(e) {
           let location = {name: 'search', query:{}, params:{}};
           let {category1id, category2id, category3id} = e.target.dataset;
            if (category1id) {
                location.query = {categoryName: category1id}
            }else if (category2id) {
                location.query = {categoryName: category2id}
            }else if (category3id) {
                location.query = {categoryName: category3id}
            }
            if (this.$route.params) {
                location.params = this.$route.params;
            }
            this.$router.push(location);
        },
        
    }
}
</script>

<style lang="less" scoped>
.type-nav {
    border-bottom: 2px solid #e1251b;

    .container {
        width: 1200px;
        margin: 0 auto;
        display: flex;
        position: relative;

        .all {
            width: 210px;
            height: 45px;
            background-color: #e1251b;
            line-height: 45px;
            text-align: center;
            color: #fff;
            font-size: 14px;
            font-weight: bold;
        }

        .nav {
            a {
                height: 45px;
                margin: 0 22px;
                line-height: 45px;
                font-size: 16px;
                color: #333;
            }
        }

        .sort {
            position: absolute;
            left: 0;
            top: 45px;
            width: 210px;
            height: 461px;
            position: absolute;
            background: #fafafa;
            z-index: 999;

            .all-sort-list2 {
                .item {
                    h3 {
                        line-height: 30px;
                        font-size: 14px;
                        font-weight: 400;
                        overflow: hidden;
                        padding: 0 20px;
                        margin: 0;

                        a {
                            color: #333;
                        }
                    }
                    .cur {
                        background-color: skyblue;
                    }

                    .item-list {
                        display: none;
                        position: absolute;
                        width: 734px;
                        min-height: 460px;
                        background: #f7f7f7;
                        left: 210px;
                        border: 1px solid #ddd;
                        top: 0;
                        z-index: 9999 !important;

                        .subitem {
                            float: left;
                            width: 650px;
                            padding: 0 4px 0 8px;

                            dl {
                                border-top: 1px solid #eee;
                                padding: 6px 0;
                                overflow: hidden;
                                zoom: 1;

                                &.fore {
                                    border-top: 0;
                                }

                                dt {
                                    float: left;
                                    width: 54px;
                                    line-height: 22px;
                                    text-align: right;
                                    padding: 3px 6px 0 0;
                                    font-weight: 700;
                                }

                                dd {
                                    float: left;
                                    width: 415px;
                                    padding: 3px 0 0;
                                    overflow: hidden;

                                    em {
                                        float: left;
                                        height: 14px;
                                        line-height: 14px;
                                        padding: 0 8px;
                                        margin-top: 5px;
                                        border-left: 1px solid #ccc;
                                    }
                                }
                            }
                        }
                    }

                    // &:hover {
                    //     .item-list {
                    //         display: block;
                    //     }
                    // }
                }
            }
        }
    }
}
</style>